Hi Brian, many thanks for the explanation.

CarlosGT



--- In fs2users@yahoogroups.com, Brian Coote <dbcoote@...> wrote:
>
> Hi Carlos,
> The SBIG camera/s are OK in themselves.
> When you may need the relay, either mechanical or preferably
optical, is
> for the standard Losmandy mounts.
> That is the G8, G11 or GM mounts with stepper motors.
> The original problem was with the standard Losmandy stepper motor
> controller which used a ´floating earth´.
> This should not exist with the FS2 controller.
> However I used an FS2 with a big Losmandy for years and had to be
very
> careful about getting ¨return earth loops¨.
> I usually had to use a separate 12 volt power supply to power the
FS2
> and say a digital encoder box or other equipment on the camera or
mount.
> This also involved not connecting the metal-braid sheathing on any
> serial DB9 connectors to the metal sheathing of the plug at BOTH
ends,
> but only one. This could easily cause an earth loop through this
> connecting between the PC, mount and equipment via the earthing on
the
> power supplies.
> It never hurts to have a relay in place.
> Brian Coote
>
> http://bcoote-astro.com/default.htm
>
>
>
> Carlos González Tirado wrote:
> >
> > Hi all, someone has tried to connect the camera Sbig St2000xm to
the
> > Fs2 controler? Need the relays controller?
> >
> > Best regards
> >
> > CarlosGT
> >
> >
> > Messages in this topic
> >
<http://groups.yahoo.com/group/fs2users/message/87;_ylc=X3oDMTMxMTA1OW
prBF9TAzk3MzU5NzE0BGdycElkAzE2ODkyODQyBGdycHNwSWQDMTcwNTA4MjgwNgRtc2dJ
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> > (1)
> >
<http://groups.yahoo.com/group/fs2users/post;_ylc=X3oDMTJvY2tsYTU1BF9T
Azk3MzU5NzE0BGdycElkAzE2ODkyODQyBGdycHNwSWQDMTcwNTA4MjgwNgRtc2dJZAM4Nw
RzZWMDZnRyBHNsawNycGx5BHN0aW1lAzEyMDM2ODg4ODk-?
act=reply&messageNum=87>
>